Research Interests
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To use and develop synchrotron radiation-based techniques to structurally characterize bioinorganic and environmentally significant samples.
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New synchrotron radiation techniques. Developed chemically specific imaging facility at SSRL, including first use of tapered metal capillary optics. Derived analysis algorithms and methods for intact biological tissues. Pioneered diffraction anomalous fine structure (DAFS) iterative analysis method and DAFS application to powder samples. |
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Transformations of metals and metalloids in the environment. The speciation and localization of metals and metalloids (especially arsenic and selenium) are traced in soils, plants and insects. More... |
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Spectroscopic speciation of sulfur in whole cells. Sulfur forms in living cultures of mammalian cells are probed using X-ray absorption spectroscopy. Chemically specific imaging is used to map sulfur species in intact onion cells. More... |
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Identification of toxicologically significant compounds in vivo. The structural bases of As-Se and Hg-Se antagonisms have been elucidated using X-ray absorption spectroscopy. The form of mercury in fish is determined. More... |
Last Modified April 23, 2004
